Grades
Dates
Come in all varieties
20150307
2018-03-24 11:07:40
24-03-2018
With functions for each!
dmy()
ymd()
mdy()
ymd_h()
ymd_hm()
ymd_hms()
What would you do?
How would you coerce 20150307 into a datetime object?
Lots of Choices
Time Zones
Time of Day